int Led=13; //define LED Interface
int buttonpin=3; // define the digital temperature sensor interface
int val;// define numeric variables val
void setup()
{
  pinMode(Led,OUTPUT); // define LED as output interface
  pinMode(buttonpin,INPUT); // define digital temperature sensor output interface
}
void loop()
{
  val=digitalRead(buttonpin);// digital interface will be assigned a value of 3 to read val
  if(val==HIGH)// when the digital temperature sensor detects a signal, LED flashes
    {
      digitalWrite(Led,HIGH);
     }
  else
    {
      digitalWrite(Led,LOW);
     }
}

